By W. Bolton (Auth.)
A self-contained evaluate of engineering fabrics - checking out, houses, remedy procedures and purposes overlaying BTEC unit U84/266. meant for college kids of mechanical and construction engineering at BTEC point NIII, the booklet comprises labored examples and difficulties
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Extra resources for Engineering Materials. Volume 3
A) For how many stress cycles could a stress amplitude of 140 MN m~2 be sustained before failure occurs? (b) What would be the maximum stress amplitude that should be applied if the component made of the material is to last for 50 million stress cycles? (c) The alloy has a tensile strength of 400 MN m -2 and a yield stress of 280 M N m 2 . What should be the limiting stress when such an alloy is used for static conditions? What should be the limiting stress when the alloy is used for dynamic conditions where the number of cycles is not likely to exceed 10 million?
11 Describe the difference between the appearance of a brittle and a ductile fracture in an impact test piece. 12 Explain how impact tests can be used to determine whether a heat treatment process has been carried out successfully. Mechanical properties of metals 27 13 The following are Izod impact energies at different temperatures for samples of annealed cartridge brass (70% copper - 30% zinc). What can be deduced from the results? Temperature/°C Impact energy/J +27 88 -78 92 -197 108 14 The following are Charpy V-notch impact energies for annealed titanium at different temperatures.
In extrusion. A plastic that includes fibres aligned in some particular direction can show quite marked differences in different directions. For instance, the tensile strength along the direction of the fibres might be of the order of 500 N mm -2 (MPa) while at right angles to the aligned fibres the tensile strength it was only 30 N mm -2 (MPa). The stress-strain relationships obtained as a result of a tensile test at a constant rate of elongation can be useful in comparing one material with another or for quality control, but may be misleading when used to predict the behaviour of the material in service.
Engineering Materials. Volume 3 by W. Bolton (Auth.)